Tool



July'ZO, 1943. J. KoPczYNsKl TOOL Fiied Feb. 19, 194s 5 R Y o E T N mi www mm M 7 mam/W p K0 QM ,m M w V HIL l'mlm /0 Patented July 20, 1943 i, UNiTE'D STATES ,PATENT oFFicE TOOL ` John Kopczynski, Buffalo, N. Y. Application February 19, 1943, Serial No. 476,455 I 19 Claims.

be punched from the sheet. When the punch is time required to replace a broken punch or toolv element.

An object of this invention vis to proved and simple support or mounting for a tool element, such as a punch for a punch press,

which will require a minimum of departure or changes in the constructions of devices of the same types Aheretofore in use; which will not greatly increase the cost of manufacture of the same; with which a punch or tool element may provide an im- Fig. 4 is a sectional plan of the same, similar V to a portion of Fig. 2, but with the tool element rotated into a position in which it may be withdrawn for replacement.

In the illustrated embodiment of the invention, the particular tool is a punch press which includes a suitable 'base liihaving a slug passage I I therethrough, and in its upper face and at the upper end of and alined with the slug passage I I, a suitable die I2 with a die opening I3. The

usual stripper plate I4 may be secured tothe base I0 so as to extend over and. be spaced from the die I2. This stripper plate I4 is provided with an aperture I5 through which the working be quickly and easily replaced, in the event of V with the appended claims.

In the accompanying drawing:

Fig. 1 is a sectional elevation through a portion of a punch press having incorporated therein a mounting of a tool element in accordance with this invention, the punch being in depressed or operated position;

Fig. 2 is a sectional plan of the same with the section taken approximately along the line 2--2 Y of Fig. 1;

Fig. 3 is a side elevation of part of the punch press shown in Figs. 1 and 2, with the punch depressed; and

end of a punch or tool element I6 extends. and in whichit reciprocates in the operation of the punch press. The shank or head of this tool element IG, which in this example is a punch, is releasably secured in a head I1 formed of a plurality of sections I8, I9 and 20 abutting sequentially face to face. Heretofore -the sections I8 and 20 have been madeY of a single piece or body, i

but in accordance with this invention, they are made of separate pieces abutting face to face and secured together in that relation in any suitable manner.

These sections I9 and 20 are provided with passages 2| and 22 alined end to end, which together form a recess opening upwardly in the lower face of the section 20. This recess is of a size and shape to rotatably and slidably receive the head or shank of the punch I6 or other tool element. One of the sections I9 and 2U, such as the section I9, is provided on the face which abuts the other section, such as the section 20, with a shallow cavity 23, see Figs. 2 and 4, which cavity intersects to some extent the recess formed ofthe alined passages 2I and 22, as shown in Figs. 2 and 4. VThis cavity 23 is of uniform depth and is closed by the abutting face of the section 20. Within this cavity 23 is a flat, plate-like key` 24 which has a uniform thickness only slightly less than the depth of the cavity 23, and slides back and forth freely in the cavity into and out of a position partially across the recess formed f the passages 2| and 22.

The shank or end of the punch or other tool element whichis received within the passages 2l and 22 is preferably cylindrical and provided with a transversely extending kerf or milled slot 25 which corresponds in size and shape to a removed segment of a cylinder. 'l'he width of this kerf or slot 25 is slightly greater than the thickness of the key or plate 24, and when the tool element is inserted in the passages 2I and 22, into the position shown in Fig. 1, this kerf or slot 25 will be placed in alinement with the key 24, and `the latter may then move into the kerf or slot to anchorthe tool element against removal from the passages 2| and 22. The opposed side walls of the slot 25 are substantially parallel to each other and in planes approximately normal to the longitudinal axis of the tool element.

A spring 26 is disposed in the cavity 23 under compression between an edge of the key 24 and the rear of the cavity, and it yieldingly and continuously urges the key 24 in a direction toward the passages 2| and 22,and thus into the kerf or slot 25 in the tool element when the latter is inserted into the passages 2|- and 22 with kerf in the portion abutting the cavity 23. The depth of the kerf or slot 25 may be approximately equal to the extent to which the cavity 23 intersects the passages 2l and 22, as shown in Fig. 2,. In Flg. 1, considerable clearance is shown between the faces of the key 24 and the sides of the kerf or slot 25, but this is done for the purpose of illustrating clearly the principle of the invention, and it will be understood, in practice, that such clearance will be relatively small, and especially revolution to cam the key 24 into retracted position, as shown in Fig. 4, and thereupon endwise movement of the tool element will release. A new tool may be then reapplied, merely by a simple upward movement of the tool element into the -alined passages 2| and 22. It will be noted that very few changes in existing constructions are necessary and that the major changes over prior devicesareincuttingtheherforslotin thehead or shank of the tool which is received within the head of the press, bevelling the end face of the tool at the corner edge thereof which is in vertical alinement with the kerf or slot, providing two sections IS, 2l. milling or forming the cavity 23 in a face of one of the sections I! and 2l, forming the key 24 from a simple flat plate, and ln adding a simple spring 2i. The cost of the de- 25 that clearance between the upper side of the kerf or slot 25 and the upper face of the key 24, should be just suiiicient to allow the key 24 to be freely snapped into the slot or kerf 25 when the tool element is insertedfully into the recess formed of passages 2l Vand 22.

To facilitate the insertion of the tool element into the head, the upper end face of the tool element, at the corner or edge alined vertically with the kerf or slot 25 may be bevelled as at 21, so 35 the bevelled corner 21 to cam aside the key 24, In

during which the spring 26 is compressed, and then when the kerf or slot 25 moves into alinement with the key 24, the latter will snap into locking position therein, and effectively hold the tool element within the head. The key provides sufllcient strength to retain the tool element in the head, even though a heavy downward pull may be exerted on the tool element during its elevation while the sheet is being stripped therefrom by the stripper plate I4.

In the event of breakage of the tool element, or if one desires to` change the tool element for a dierent job, it is merely necessary to rotate slightly the tool element in the alined passages 2l and. 22, and the cylindrical surface of the shank or head of the tool element within the passage 22 at either end of the kerf or slit will act as a cam to cam or force the key 24 back into the cavity 23, as shown in Fig. 4, sufliciently to completely disengage the key 24 from the kerf or slot 25. The tool element may then be pulled downwardly by a simple endwise movement which fully releases it from the head. The 24 then snaps back into the position shown in Fig. 2, except that the tool element has then been withdrawn.

To insert a new element, that element is moved upwardly in the passage 2| with the bevelled corner 21 alined vertically with the key 24, and during this upward movement, the corner 21 cams the key aside, and then the key snaps into the kerf or slot 25 of the new tool as soon as the slotmoves into alinement therewith. Thus, a tool element or punch may be quickly and easily replaced for any reason, merely by rst rotating the tool element or punch through a part of a invention has been illustrated and described in connectionwith quick change dies and punches, the same idea may be similarly employed in securing otherv tool elements in operative positions in holders where similar problems are encountered.

It will be noted that the cavity 23 is clear or free of all positive mechanical obstructions to the free back and forth movement of the key into and out of a position in the transverse slot in the tool element. The key moves in a plane normal to the longitudinal axis of the recess in which the tool element is received, so that there will be no unnecessary binding or wedging of the key that would interfere with its spring action. The side wall of the slot 25, which is the upper one in Fig. 1, and the face of the key 24 that is engaged by that wall are both in planes normal to the longitudinal axis of the recess in the holder, so that danger of the key being unintentionally released by a cam action between the slot wall and the key is avoided. The cavity 23 is of simple form so that it can be milled out easily. It will also be noted that the key is unbroken from end to end entirely through the slot 25, thus giving maximum strength. Since the cavity 23 is shallow, it does not materially weaken the holder section in which it is formed.

It will be also understood that various changes in the details and arrangements of parts, which have been hereindescribed and illustrated in order to explain the nature of the invention, may be made by those skilled in the art the principle and scope of the invention as expressed in the appended claims. Y

I claim as my invention:

1. A tool comprising a holder formed of two sections abutting face to face and having passages aligned end to end to form a recess extending through one section into the other, with its longitudinal axis normal to said faces, one of said sections having a cavity in that face thereof which abuts the other section and intersecting said recess, a tool element rotatable and slidable endwise in said recess and having a segmental kerf in a side thereof which may be aligned with and opening into said recess when said elementis fully within said recess, a key confined within and slidable in said cavity, into and out of said kerf, a spring in said cavity urging said key yieldingly ment. is pushed ndwise. into` said recess with` said intseqtedbvs 1d yiiility.,V A i i091 @91a ling. a i holder ,formed `9i W0 sections abutting .t face ,to face and J having passagesalignedmendlto end` to form, a recess extend-L" insthrsiueh Onestieinwth Qtheflvim it longitudine, ,axis normal tosaid `abutting faces, fs `id f es havingtherein aucavity` inter-` secting said ,r s, al iiatkey having parallelfaces and' slidilbl` inwhlicfit y ,n another position in which it` ,teclearv of said }re-j cess,r and means :torv yieldingly `artid f continuously urging said key `into tsxsaid one` position, whereby Wlienfthefshahkofwa "o1 "elementwith `a.` trans--l verse keri tlitifreinl"V erted inv said recess with] SifA kf lgoidwth-Sld cavity' sgi@ key may se `15projecterigirse aiu ierf to, lock` `sala morele:

mentag nstre` foval'frorn saidfitergcs.`

1 lies part lly across, recess and` beveietdyedge aiinswitn the sidefof said recess 5. A tool comprising a holder formed of two sections abutting face to face and having passages aligned end to end to form a recess extending through one section into the other, with its longitudinal vaxis normal to said abutting faces, one ofsaid faces having therein a cavity intersecting saidrecess, a fiat key having parallel faces andshiftable in said cavity between one position in whichjit lies partially across said recess and another position in which it is clear of said recess, means for yieldingly and continuously urging said key into its said one position, and a tool element having a shank removably insertable endwise in said `recess and slidable endwise and rotatable thereimsaid shank having a transverse kerffaligned with" said cavity when said element is"`fully within said recess, and into which said key may be moved by said urging means, to lock saidfelementjwithin said recess, said kerf having itsside walinearest the end nrst entering said recess, disposed approximately normal to the longitiidinal' axis of said recess, the end face of said element first to enter said recess being beveled on anedge to act as a cam and push aside said key 001 prism a holderyformedof tyd sect-ons bi1 `fa etog'faceandhavingpassages aligned nd, Ae to, forma recess extending tliryugh tudinll; d said faces saidrec'e v `02131341,tSfiff abutting fiesrllle 0f` vine "theingcviw y intersecting `flat k "fhalving parallel o faces and btween elle PSitiO ,in

ross "said "recess and anit `is clear of said recess, `'continuouslyurging said ,t t o t, f mitionlandatoolelement having i shank movably `1nsrwtliierldvfiw in, said recess and "siidable `endwise and` "rotatable theifeiln',v said "shank having a transverse kerf aiignefdfwith said"cavity when said "elementds fully,` within dementi )within said recess; fsaia kerf` `hating its side wall meanestV the end iirst enteringsaid recess, disposed approximately normal to the longitudinal axislof said recess.`

f4.' n'tolconiprisinga `holder formed of itwo sections abutting face "to faceaxidohaving passages aligned end tofend to form arecessextending through! onesection intouthef'other, with-its longitudinal axis normal to said abutting faces, one of said-faces having `therein a cavity interfaces and `shif'table said cavity `between `one po-` sitionin 'whicnit lies partially across said recess and anotherposition in which it is clear of said recess, means for `yieldingly and continuously urging said `key iritdits` said one" position,` and a tooll element 'having cylindrical shank `fitting and movable endwiseintu and out `of said recess and alsorotatable `vlrithinsaid recess about its assaid element inserted endwise into said recess with saidbeveled edge aligned, in a direction lengthwise of said recess, with the portion of said keyextending into said recess.

,6g Axtoolcomprising a holder having a cylindrioal recess, a tool element having a cylindrical shankreceived in said recess and movable endwise and rotatably therein, said shank having a transverse kerf cut segmentally across a side thereofin `the portion within said recess, the side' wall of saidkerf iirst entering said recess being a flat surface and in a plane' substantially normal tot the longitudinal axisof said recess, said holder also having entirely enclosed therein, a shallow, closed cavity which along one side edge thereof slightly intersects said recess, a at plate-like key disposed in` saidcavity and movable rectilineariy therein in a direction radially towards and from y said axis of said recess to move an edge portion /to enterisaid kerf, and a at face and a fiat zone s 1d recess," and intofwhichsaidkey may be moved by saidnrging means to` lock said lo`ni =,`fitu`dinalf axis, said-,shankhaving a transverse `kerl? across a t o o said "cavity" when ,said` element fully within said recessltheplanes of thefopposite side walls of said lreryff` beingjapproximtelynormal to the axis of id recessfand spaced apart toV receive betweenrnemsaidkem f n portionof its side and aligned with along said edge portion on the face of the key abuttingsaid ilatside wall of said kerf, which fiat zone `is in a plane normal to said recess axis, and a spring within said cavity and compressed between anedge of lsaid key and an edge wall of said cavity and yieldingly urging said key into said kerf to latch said shank within said recess.

'1. A `tool comprising a. holder formed of a plurality of fiat plates abutting face to face sequentially and having a cylindrical recess extending in aldirectionnormal to said abutting faces, a tool element having a cylindrical shank received in fsaid recessand movable endwise and rotatably therein, said shank having a transverse kerf ex-V tending seglnentally across a side thereof inthe portion within said recess, the opposite side walls ofsaid kerf `being approximately fiat and parallei to eachother and in planes approximately normal to the longitudinal axis of said recess, said holder also having entirely therein between two of' said abutting faces, a shallow, closed cavity of 'uniformdepth and slightly ntersectl ing said" recess, at one side thereof, a, fiat key disposed in said cavity and movable therein into and out of a position` across a portion of said recess `and having, along its side edge nearest said recess, lfiat, parallel faces dening a thickness that enables said side edge portion of said key to enter said kerf, and a spring within said cavity and compressed between an edge of said key and an edge wall of said cavity and yieldingly urging said key into said kerf to latch said shank within said recess.

8. A tool comprising a holder formed of a plurality of flat plates abutting face to face sequentially and having a cylindrical recess extending in a direction normal to said abutting faces from one face only of said holder and past one of said abutting faces, a tool element having a cylindrical shank received in said recess and movable endwtse and rotatably therein, said shank having a transverse kerf extending segmentaily entirely across a side thereof in the portion within said recess, the side wall of said kerf first to enter said recess being in a plane substantially normal to the longitudinal axis of said recess, said holder also having entirely therein and between two of said abutting faces, a shallow, closed cavity slightly intersecting said recess at one side thereof, a. iiat plate-like key disposed in said cavity and movable rectilinearly therein into and out of a position across a portion of said recess to move an edge zone thereof into and out of the face of said key farthest from the entrance to said recess and along said zone being flat and in a plane normaltosaidrecessaxisandasprngwithinsaid cavity and compressed between an edge of said key and an edge wall of said cavity and yieldingly urging said key into said kerf to latch said shank within said recess.

9. A tool comprising a holder formed of a plurality of ilat plates abutting face to face sequentially and having a cylindrical recess opening therein from one face thereof, extending in a direction normal to said abutting faces, and also having entirely therein between two of said abutting faces a shallow, closed cavity of uniform depth and slightly intersecting said recess at one side of the latter in a zone between and spaced from the ends of said recess, a nat, plate-like key disposed in said cavity and slidable rectilinearly and bodily therein and guided at its ends by opposite sides of said cavity into and out of a position in which an edge portion thereof projects somewhat into said recess, a spring within said cavity and .compressed between an edge of said key and an edge wall of said cavity for yield- 1 ingly urging said key towards said recess, whereby when a tool element is inserted endwise into said recess until a kerf on the side of said element becomes aligned with said cavity, said key may be projected into said kerf to latchsaid element within said recess.

l0. A tool element having a shank with a channel slot extending sequentially and entirely across a side thereof at a zone spaced from the end of said shank, said slot having'its opposite side walls flat, approximately parallel toV each other, and in planes normal to the longitudinal axis of said shank, the end face of said shank having an edge portion thereof beveled olf to serve as a cam.

1l. A tool comprising a holder formed of a plurality of iiat plates abutting face to face sequentially and having a cylindrical recess opening therein from one face thereof, extending in a direction normal to said abutting faces, and also having entirely therein between two of said abutl proximately normal to the longitudinal axis of said recess into and out of a position in which an edge portion thereofprojects somewhat into but not entirely across said recess, a spring within said cavity and under stress to urge said key yieldingly and resiliently into said position, a tool element having a shank rotatably and slidably fitting said recess and having a transverse groove extending entirely across and segmentally of the periphery thereof between the ends of said recess and alined with said key when said element is'fully within said recess, said groove having a distance between its opposite side walls which is greater than the thickness of the adjacent edge of said key, whereby said key when released may be automatically moved by said spring into said slot, said groove having its side wall which engages with said key to resist its removal from said recess disposed in a plane substantially normal to the longitudinal axis of said recess, and

, said key having its face that is engaged with that wall in said groove disposed parallel to that wall, said cavity being free of positive mechanical obstructions preventing movement of said key into and out of said position.

12. A tool comprising a holder formed of a plurality of flat plates abutting face to face sequentially and having a cylindricalrecess opening therein from one face thereof, extending in a direction normal to said abutting faces, and also having entirely therein between two o said abutting faces a shallow cavity intersecting said recess at one side of the latter in a zone between and spaced from the ends of said recess, a key confined Within said cavity and shiftable rectilinearly and. bodily therein in a direction approximately normal to the longitudinal axis of said recess into and out of a position in which an edge portion thereof projects somewhat into but not entirely across said recess, a coil spring within said cavity and under stress between an edge of said key and a side wall of said lcavity to urge said key yieldingly and resiliently into said position, said key edge and side wall of said cavity being recessed to receive the ends of said spring, a tool element having a shank rotatably and slidably iitting said recess and having a transverse slot in and entirely across the periphery thereof between the ends of said recess and alined with said key when said element is fully within said recess, said slot having a. distance between its opposite side walls which is greater than the l thickness of the adjacent edge of said key, whereby said key when released may be automatically moved by said spring into said slot, said slot having its side wall which engages with said key to resist its removal from said recess disposed in a plane substantially normal to the longitudinal axis of said recess, and said key having its face zone that is engaged with that wall in said slot disposed parallel to that wall, said cavity being free of positive mechanical obstructions preventing movement of said key into and out of said position.

13. A tool comprising a holder having a cylindrical recess opening therein from one face thereof and also having entirely therein a shallow, closed cavity intersecting said recess at one side of the latter in a zone between and spaced from the ends of said recess, a dat, plate-like key with rectangular side edges and all flat faces confined within said cavity and shiftable therein, with opposite edges thereof guided by opposite sides of said cavity and opposite faces thereof guided by opposite faces of said cavity, rectilinearly in a,

direction approximately normal to the longitudinal axis of said recess into and out of a position in which an edge portion thereof projects somewhat into but not entirely across said recess, la spring withinsaid cavity and under stress to urge said key yieldingly and resiliently into Isaid position, a tool element having a shank rotatably and siidably fitting said recess and having a transverse slot in and entirely across the periphery thereof between the ends of said recess and alined with said key when said element is fully within said recess, said slot having a distance between its opposite side walls which is greater across said1 recess, whereby when the shank ot a tool element with a kerf in its side element is inserted in said recess with the kerf. aligned with said cavity, said plate may be projected into said kerf to lock said tool element agains removal from saidl recess. 1

17. A coupling comprising a member formed of a plurality of flat plates abutting face to face than the thickness of the adjacent edge of said key, whereby said key when released may be automatically moved by said spring into said slot, said slot having its side wall which engages with said key to vresist its removal from said recess flat andldisposed in a plane approximately normal to the longitudinal axis of said recess, and said key having its face zone that is engaged with that wall in said slot disposed parallel to that wall, also fiat and in substantially continuous contact therewith entirely across said slot, said cavity being free of positive l mechanical obstructions preventing movement oi' said key into and out lof said position.

14. A tool comprising a holder lformed of, a plurality of flat plates abutting face to face sequentially and having a recessopening therein from an interior zone of the outside face of one of said plates at the end of a sequence and extending in a direction normal to said outside fa'ce for a `distance past a pair of said abutting faces, said .holder having a closed cavity and formed between said pair of abutting faces, intersecting said Arecess at o'ne side of the latter, and closed around its entire periphery by said plates, a key in said cavity and movablev therein into and out of a position in which itV lies partially across said recess, and a spring in said cavity urging said key yieldinglvinto its said position, whereby when the shank of a tool element with a kerf in its side is inserted in said recess with said kerf aligned with said cavity, said key may be projected into said kerf to lock said tool element'against removal from said recess.

15. A tool element having a shank extending therefrom with a channel slot extending segmentally and entirely across a side thereof at a zone well spaced from the free end of said shank, said slot having its side wall nearest said end of said shank flat and in a plane substantially normal to the longitudinal axis of said shank.

16. A tool` comprising a holder formed of a plurality of iiat plates abutting face to face sequentially and having a recessopening therein from an interior zone of the outside face of one of said plates at the end of a sequence and extending in a direction normal to said'outside face for a distance past a pair of said abutting faces, said holder having a closed cavity of uniform, shallow depth between faces that are parallel to said abutting faces, and spaced around its entire periphery from the margins of said plates and intersecting said recess at one side of the latter, a fiat plate in said cavity and movable back and forth therein into and out of a position in which it lies partially across said recess, and a spring in said recess acting between an edge of said plateand a side wall of said cavity to urge said plate towards its said position partly Cil sequentially and having a cylindrical recess opening therein from an interior zone of the outside face of one of said'plates at the end of a sequence and extending in a direction normal to saidoutside face for a distance past a pair of said abutting faces, said holder having a closed cavity formed in the interior area thereof between said pair of abutting faces and intersecting said recess at one side of the latter, a fiat plate in said cavity and slidable therein and guided by the faces and sides of said cavity, into and out of a position in which it lies partially across said recess, and a spring in said cavity and acting between an edge of said plate and a side wall of said cavity to urge said plate into said position.

18.,A coupling comprising a member formed of a plurality of flat plates abutting face to face sequentially and having a cylindrical recess opening therein from an interior zone of the` outside face of one of said plates at the end of a sequence and extending in a direction normal to said outside face for a distance past a pair of said abutting faces, lsaid holder having a closed cavity formed in the interior area thereof between said pair of abutting faces and intersecting said recess at one side of the latter, a flat plate in said cavity and slidable therein and guided by the faces and sides of said cavity, into and out of a position in which it lies partially across said recess, a spring in said cavity and acting between an edge of said plate and a side wall of said cavity to urge said plate into said position, and a cylindrical element rotating and sliding endwise in said recess and having in v alignment with said cavity a segmental kerl cut entirely across a side of said element and of a width suficient to receive therein the adjacent edge of said plate, the side wall of said kerf rst to enter said recess being fiat and in a plane normal to the longitudinal axis of said recess.

19. A4 coupling comprising a member formed of a plurality of flat plates abutting face to face sequentially and having a cylindrical recess opening therein from an interior zone of the outside face of one of said plates at the end of a sequence and'extending'in a direction normal to said outside face for a distance past a pair of said abutting faces, said holder having a closed cavity formed in the interior area thereof between said pair of abutting faces and.inter secting said recessat one side ofthe latter, a

lsliding endwise in said recess and having in alignment with the cavity a notch in its' side wall` of a size suilicient to receive the adjustable' edges and'plate for normally preventing endwise movement of said element in said recess.

JonN KoPozvNsKr, 

